Here is the full list of all 590 Pain Train achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Fire Assault Rifle 130 Times
Fire Assault Rifle 125 Times
Fire Assault Rifle 115 Times
Fire Assault Rifle 120 Times
Fire Assault Rifle 105 Times
Fire Assault Rifle 110 Times
Fire Assault Rifle 95 Times
Fire Assault Rifle 100 Times
Fire Assault Rifle 90 Times
Fire Assault Rifle 85 Times
Fire Assault Rifle 75 Times
Fire Assault Rifle 80 Times
Fire Assault Rifle 65 Times
Fire Assault Rifle 70 Times
Fire Assault Rifle 55 Times
Fire Assault Rifle 60 Times
Fire Assault Rifle 50 Times
Fire Assault Rifle 40 Times
Fire Assault Rifle 45 Times
Fire Assault Rifle 35 Times
Fire Assault Rifle 30 Times
Fire Assault Rifle 25 Times
Fire Assault Rifle 20 Times
Kill 1000 Infected to complete
Kill 998 Infected to complete
Kill 992 Infected to complete
Kill 994 Infected to complete
Kill 996 Infected to complete
Kill 990 Infected to complete
Kill 988 Infected to complete
Kill 986 Infected to complete
Kill 984 Infected to complete
Kill 982 Infected to complete
Kill 980 Infected to complete
Kill 978 Infected to complete
Kill 976 Infected to complete
Kill 974 Infected to complete
Kill 972 Infected to complete
Kill 970 Infected to complete
Kill 968 Infected to complete
Kill 966 Infected to complete
Fire Assault Rifle 15 Times
Kill 964 Infected to complete
Kill 962 Infected to complete
Kill 960 Infected to complete
Kill 958 Infected to complete
Kill 956 Infected to complete
Kill 954 Infected to complete
Kill 952 Infected to complete
Kill 950 Infected to complete
Kill 948 Infected to complete
Kill 946 Infected to complete
Kill 944 Infected to complete
Kill 942 Infected to complete
Kill 940 Infected to complete
Kill 938 Infected to complete
Kill 936 Infected to complete
Kill 934 Infected to complete
Kill 930 Infected to complete
Kill 932 Infected to complete
Kill 928 Infected to complete
Kill 926 Infected to complete
Kill 924 Infected to complete
Kill 922 Infected to complete
Kill 920 Infected to complete
Kill 918 Infected to complete
Complete 12 Levels
Kill 916 Infected to complete
Kill 914 Infected to complete
Kill 912 Infected to complete
Kill 910 Infected to complete
Kill 908 Infected to complete
Kill 906 Infected to complete
Kill 904 Infected to complete
Kill 902 Infected to complete
Kill 900 Infected to complete
Kill 898 Infected to complete
Complete 11 Levels
Kill 896 Infected to complete
Kill 894 Infected to complete
Kill 892 Infected to complete
Kill 890 Infected to complete
Kill 888 Infected to complete
Kill 886 Infected to complete
Complete 10 Levels
Kill 884 Infected to complete
Kill 882 Infected to complete
Kill 880 Infected to complete
Kill 878 Infected to complete
Kill 876 Infected to complete
Kill 874 Infected to complete
Kill 872 Infected to complete
Kill 870 Infected to complete
Kill 868 Infected to complete
Kill 866 Infected to complete
Kill 862 Infected to complete
Kill 864 Infected to complete
Kill 860 Infected to complete
Kill 858 Infected to complete
Kill 856 Infected to complete
Kill 854 Infected to complete
Kill 852 Infected to complete
Kill 850 Infected to complete
Kill 848 Infected to complete
Kill 846 Infected to complete
Kill 844 Infected to complete
Kill 842 Infected to complete
Kill 840 Infected to complete
Kill 836 Infected to complete
Kill 838 Infected to complete
Kill 834 Infected to complete
Kill 832 Infected to complete
Kill 830 Infected to complete
Kill 828 Infected to complete
Kill 826 Infected to complete
Kill 820 Infected to complete
Kill 822 Infected to complete
Kill 824 Infected to complete
Kill 818 Infected to complete
Kill 816 Infected to complete
Kill 814 Infected to complete
Kill 810 Infected to complete
Kill 812 Infected to complete
Kill 808 Infected to complete
Kill 806 Infected to complete
Kill 802 Infected to complete
Kill 804 Infected to complete
Kill 798 Infected to complete
Kill 800 Infected to complete
Kill 794 Infected to complete
Kill 796 Infected to complete
Kill 792 Infected to complete
Kill 790 Infected to complete
Kill 786 Infected to complete
Kill 788 Infected to complete
Kill 784 Infected to complete
Kill 782 Infected to complete
Kill 780 Infected to complete
Kill 778 Infected to complete
Kill 776 Infected to complete
Kill 774 Infected to complete
Kill 772 Infected to complete
Kill 770 Infected to complete
Kill 768 Infected to complete
Kill 766 Infected to complete
Kill 764 Infected to complete
Kill 762 Infected to complete
Kill 760 Infected to complete
Kill 758 Infected to complete
Kill 756 Infected to complete
Kill 754 Infected to complete
Kill 752 Infected to complete
Kill 750 Infected to complete
Kill 748 Infected to complete
Kill 746 Infected to complete
Kill 744 Infected to complete
Kill 742 Infected to complete
Kill 738 Infected to complete
Kill 740 Infected to complete
Kill 736 Infected to complete
Kill 732 Infected to complete
Kill 734 Infected to complete
Kill 728 Infected to complete
Kill 730 Infected to complete
Kill 726 Infected to complete
Kill 724 Infected to complete
Kill 722 Infected to complete
Kill 718 Infected to complete
Kill 720 Infected to complete
Kill 716 Infected to complete
Kill 712 Infected to complete
Kill 714 Infected to complete
Kill 710 Infected to complete
Kill 708 Infected to complete
Kill 706 Infected to complete
Kill 704 Infected to complete
Kill 702 Infected to complete
Kill 700 Infected to complete
Kill 698 Infected to complete
Kill 696 Infected to complete
Complete 9 Levels
Kill 694 Infected to complete
Kill 692 Infected to complete
Kill 686 Infected to complete
Kill 688 Infected to complete
Kill 690 Infected to complete
Kill 684 Infected to complete
Kill 682 Infected to complete
Kill 680 Infected to complete
Kill 678 Infected to complete
Kill 674 Infected to complete
Kill 676 Infected to complete
Kill 670 Infected to complete
Kill 672 Infected to complete
Kill 668 Infected to complete
Kill 666 Infected to complete
Kill 664 Infected to complete
Kill 662 Infected to complete
Kill 660 Infected to complete
Kill 656 Infected to complete
Kill 658 Infected to complete
Kill 654 Infected to complete
Kill 652 Infected to complete
Kill 650 Infected to complete
Kill 648 Infected to complete
Kill 646 Infected to complete
Kill 642 Infected to complete
Kill 644 Infected to complete
Kill 640 Infected to complete
Kill 638 Infected to complete
Kill 636 Infected to complete
Kill 634 Infected to complete
Kill 630 Infected to complete
Kill 632 Infected to complete
Kill 628 Infected to complete
Kill 624 Infected to complete
Kill 626 Infected to complete
Kill 620 Infected to complete
Kill 622 Infected to complete
Kill 618 Infected to complete
Kill 616 Infected to complete
Kill 614 Infected to complete
Kill 612 Infected to complete
Complete 8 Levels
Kill 610 Infected to complete
Kill 608 Infected to complete
Kill 606 Infected to complete
Kill 604 Infected to complete
Kill 602 Infected to complete
Kill 600 Infected to complete
Kill 598 Infected to complete
Kill 596 Infected to complete
Kill 594 Infected to complete
Kill 592 Infected to complete
Kill 584 Infected to complete
Kill 586 Infected to complete
Kill 588 Infected to complete
Kill 590 Infected to complete
Kill 582 Infected to complete
Kill 578 Infected to complete
Kill 580 Infected to complete
Kill 576 Infected to complete
Kill 572 Infected to complete
Kill 574 Infected to complete
Kill 570 Infected to complete
Kill 568 Infected to complete
Kill 566 Infected to complete
Kill 564 Infected to complete
Kill 560 Infected to complete
Kill 562 Infected to complete
Kill 558 Infected to complete
Kill 556 Infected to complete
Kill 554 Infected to complete
Kill 550 Infected to complete
Kill 552 Infected to complete
Kill 548 Infected to complete
Kill 546 Infected to complete
Kill 544 Infected to complete
Kill 540 Infected to complete
Kill 542 Infected to complete
Kill 538 Infected to complete
Complete 7 Levels
Kill 536 Infected to complete
Kill 532 Infected to complete
Kill 534 Infected to complete
Kill 530 Infected to complete
Kill 528 Infected to complete
Kill 526 Infected to complete
Kill 524 Infected to complete
Kill 522 Infected to complete
Kill 520 Infected to complete
Kill 518 Infected to complete
Kill 516 Infected to complete
Kill 514 Infected to complete
Kill 512 Infected to complete
Kill 508 Infected to complete
Kill 510 Infected to complete
Kill 506 Infected to complete
Kill 502 Infected to complete
Kill 504 Infected to complete
Kill 500 Infected to complete
Kill 494 Infected to complete
Kill 496 Infected to complete
Kill 498 Infected to complete
Kill 492 Infected to complete
Kill 488 Infected to complete
Kill 490 Infected to complete
Kill 486 Infected to complete
Kill 484 Infected to complete
Kill 482 Infected to complete
Kill 480 Infected to complete
Kill 478 Infected to complete
Kill 476 Infected to complete
Complete 6 Levels
Kill 472 Infected to complete
Kill 474 Infected to complete
Kill 470 Infected to complete
Kill 468 Infected to complete
Kill 466 Infected to complete
Kill 464 Infected to complete
Kill 462 Infected to complete
Kill 460 Infected to complete
Kill 458 Infected to complete
Kill 454 Infected to complete
Kill 456 Infected to complete
Kill 452 Infected to complete
Kill 450 Infected to complete
Kill 448 Infected to complete
Kill 446 Infected to complete
Kill 444 Infected to complete
Kill 440 Infected to complete
Kill 442 Infected to complete
Kill 438 Infected to complete
Kill 434 Infected to complete
Kill 436 Infected to complete
Kill 430 Infected to complete
Kill 432 Infected to complete
Kill 428 Infected to complete
Kill 426 Infected to complete
Kill 424 Infected to complete
Kill 422 Infected to complete
Kill 420 Infected to complete
Kill 418 Infected to complete
Kill 414 Infected to complete
Kill 416 Infected to complete
Complete 5 Levels
Kill 412 Infected to complete
Kill 410 Infected to complete
Kill 406 Infected to complete
Kill 408 Infected to complete
Kill 402 Infected to complete
Kill 404 Infected to complete
Kill 400 Infected to complete
Kill 398 Infected to complete
Kill 396 Infected to complete
Kill 394 Infected to complete
Kill 392 Infected to complete
Kill 390 Infected to complete
Kill 388 Infected to complete
Kill 386 Infected to complete
Kill 384 Infected to complete
Kill 382 Infected to complete
Kill 380 Infected to complete
Kill 378 Infected to complete
Kill 376 Infected to complete
Kill 372 Infected to complete
Kill 374 Infected to complete
Kill 370 Infected to complete
Kill 368 Infected to complete
Kill 366 Infected to complete
Kill 364 Infected to complete
Kill 362 Infected to complete
Kill 360 Infected to complete
Kill 358 Infected to complete
Kill 356 Infected to complete
Kill 354 Infected to complete
Complete 4 Levels
Kill 352 Infected to complete
Kill 350 Infected to complete
Kill 348 Infected to complete
Kill 344 Infected to complete
Kill 346 Infected to complete
Kill 342 Infected to complete
Kill 340 Infected to complete
Kill 338 Infected to complete
Kill 336 Infected to complete
Kill 334 Infected to complete
Kill 332 Infected to complete
Kill 330 Infected to complete
Kill 328 Infected to complete
Kill 326 Infected to complete
Kill 324 Infected to complete
Kill 322 Infected to complete
Kill 320 Infected to complete
Kill 318 Infected to complete
Kill 316 Infected to complete
Kill 314 Infected to complete
Kill 312 Infected to complete
Complete 3 Levels
Kill 310 Infected to complete
Kill 308 Infected to complete
Kill 306 Infected to complete
Kill 304 Infected to complete
Kill 302 Infected to complete
Kill 300 Infected to complete
Kill 298 Infected to complete
Fire Assault Rifle 10 Times
Kill 296 Infected to complete
Kill 294 Infected to complete
Kill 292 Infected to complete
Kill 290 Infected to complete
Kill 288 Infected to complete
Kill 286 Infected to complete
Kill 284 Infected to complete
Kill 282 Infected to complete
Kill 280 Infected to complete
Kill 278 Infected to complete
Kill 276 Infected to complete
Kill 274 Infected to complete
Kill 272 Infected to complete
Kill 270 Infected to complete
Kill 268 Infected to complete
Kill 266 Infected to complete
Kill 264 Infected to complete
Kill 262 Infected to complete
Kill 260 Infected to complete
Kill 258 Infected to complete
Kill 256 Infected to complete
Kill 254 Infected to complete
Kill 252 Infected to complete
Kill 250 Infected to complete
Kill 248 Infected to complete
Kill 246 Infected to complete
Kill 242 Infected to complete
Kill 244 Infected to complete
Kill 240 Infected to complete
Kill 238 Infected to complete
Kill 234 Infected to complete
Kill 236 Infected to complete
Kill 232 Infected to complete
Kill 230 Infected to complete
Kill 228 Infected to complete
Kill 226 Infected to complete
Kill 224 Infected to complete
Kill 222 Infected to complete
Kill 220 Infected to complete
Kill 218 Infected to complete
Kill 216 Infected to complete
Kill 214 Infected to complete
Kill 212 Infected to complete
Kill 210 Infected to complete
Kill 208 Infected to complete
Kill 206 Infected to complete
Kill 204 Infected to complete
Kill 202 Infected to complete
Kill 200 Infected to complete
Kill 198 Infected to complete
Kill 196 Infected to complete
Kill 194 Infected to complete
Kill 190 Infected to complete
Kill 192 Infected to complete
Kill 188 Infected to complete
Kill 186 Infected to complete
Kill 184 Infected to complete
Kill 182 Infected to complete
Kill 180 Infected to complete
Kill 178 Infected to complete
Kill 176 Infected to complete
Kill 174 Infected to complete
Kill 172 Infected to complete
Kill 170 Infected to complete
Kill 166 Infected to complete
Kill 168 Infected to complete
Kill 164 Infected to complete
Kill 162 Infected to complete
Kill 160 Infected to complete
Kill 158 Infected to complete
Kill 156 Infected to complete
Kill 154 Infected to complete
Kill 152 Infected to complete
Kill 150 Infected to complete
Kill 148 Infected to complete
Kill 146 Infected to complete
Kill 144 Infected to complete
Kill 142 Infected to complete
Kill 140 Infected to complete
Kill 138 Infected to complete
Kill 136 Infected to complete
Kill 134 Infected to complete
Kill 132 Infected to complete
Fire Assault Rifle 5 Times
Complete 2 Levels
Kill 130 Infected to complete
Kill 128 Infected to complete
Kill 126 Infected to complete
Kill 124 Infected to complete
Kill 122 Infected to complete
Kill 120 Infected to complete
Kill 118 Infected to complete
Kill 116 Infected to complete
Kill 114 Infected to complete
Kill 112 Infected to complete
Kill 110 Infected to complete
Complete 1 Level
Kill 108 Infected to complete
Kill 106 Infected to complete
Kill 104 Infected to complete
Kill 102 Infected to complete
Kill 100 Infected to complete
Kill 98 Infected to complete
Kill 96 Infected to complete
Kill 94 Infected to complete
Kill 92 Infected to complete
Kill 90 Infected to complete
Kill 88 Infected to complete
Kill 86 Infected to complete
Kill 84 Infected to complete
Kill 82 Infected to complete
Kill 80 Infected to complete
Kill 78 Infected to complete
Kill 74 Infected to complete
Kill 76 Infected to complete
Kill 72 Infected to complete
Kill 70 Infected to complete
Kill 68 Infected to complete
Kill 66 Infected to complete
Kill 64 Infected to complete
Kill 62 Infected to complete
Kill 60 Infected to complete
Fire Shotgun 52 Times
Fire Shotgun 50 Times
Kill 58 Infected to complete
Fire Shotgun 48 Times
Kill 56 Infected to complete
Kill 54 Infected to complete
Fire Shotgun 46 Times
Fire Shotgun 44 Times
Kill 52 Infected to complete
Fire Shotgun 42 Times
Fire Shotgun 40 Times
Fire Shotgun 38 Times
Kill 50 Infected to complete
Kill 48 Infected to complete
Kill 46 Infected to complete
Kill 44 Infected to complete
Kill 42 Infected to complete
Kill 38 Infected to complete
Kill 40 Infected to complete
Kill 36 Infected to complete
Kill 34 Infected to complete
Fire Pistol 104 Times
Fire Pistol 96 Times
Fire Pistol 100 Times
Kill 32 Infected to complete
Fire Pistol 92 Times
Fire Shotgun 36 Times
Fire Shotgun 34 Times
Fire Shotgun 32 Times
Fire Shotgun 30 Times
Fire Shotgun 28 Times
Kill 30 Infected to complete
Fire Shotgun 26 Times
Kill 28 Infected to complete
Fire Shotgun 24 Times
Fire Shotgun 22 Times
Fire Shotgun 20 Times
Fire Shotgun 18 Times
Fire Shotgun 16 Times
Fire Shotgun 14 Times
Fire Shotgun 12 Times
Fire Shotgun 10 Times
Kill 26 Infected to complete
Kill 24 Infected to complete
Fire Shotgun 8 Times
Fire Shotgun 6 Times
Kill 22 Infected to complete
Fire Shotgun 4 Times
Kill 20 Infected to complete
Kill 18 Infected to complete
Kill 16 Infected to complete
Fire Shotgun 2 Times
Fire Pistol 88 Times
Fire Pistol 84 Times
Kill 14 Infected to complete
Fire Pistol 80 Times
Fire Pistol 76 Times
Kill 12 Infected to complete
Fire Pistol 72 Times
Fire Pistol 68 Times
Fire Pistol 64 Times
Fire Pistol 56 Times
Fire Pistol 60 Times
Kill 10 Infected to complete
Fire Pistol 48 Times
Fire Pistol 52 Times
Kill 8 Infected to complete
Fire Pistol 40 Times
Fire Pistol 44 Times
Kill 6 Infected to complete
Fire Pistol 36 Times
Fire Pistol 32 Times
Fire Pistol 28 Times
Fire Pistol 20 Times
Fire Pistol 24 Times
Kill 4 Infected to complete
Fire Pistol 16 Times
Fire Pistol 8 Times
Fire Pistol 12 Times
Kill 2 Infected to complete
Fire Pistol 4 Times